Kate is looking super-toned

Kate Middleton has revealed an incredibly flat stomach just three months after giving birth to son Prince George.

The Duchess, 31, showed off her trim tum as she played volleyball at the Olympic Park‘s Copper Box in Stratford, London earlier today.

She was visiting SportsAid‘s workshop – a charity she’s patron of – to watch young athletes play games including wheelchair basketball before joining them at educational talks.

Kate looked lovely in a pair of tight-fitting jeans, a navy blazer and a cute stripy top for her day out, which she matched with her trademark wavy blow-dry.

As she ran around the court, her T-shirt flew up to put her super-toned abs on display.

The pretty mum – who’d left husband Prince William at home – also impressed by shooting a few balls in a pair of high wedges.

SportsAid were very excited about Kate‘s arrival last night.

‘We’re all set at the Copper Box and very excited for our first event with HRH the Duchess of Cambridge tomorrow,’ they Tweeted.

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Anna Duff